As of September 09, 2026, the three largest insider holders of GNLX are Thomas Zindrick (President And Ceo, 1.23Mn shares), Aladar Szalay (TenPercentOwner, 599.82K shares), Aladar Szalay (TenPercentOwner, 599.82K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Thomas Zindrick | President And Ceo | 1,226,427 | 0 | 1,226,427 | 30.1% | 02 Sep, 2026 |
| 2 | Aladar Szalay | TenPercentOwner | 0 | 599,821 | 599,821 | 14.7% | 13 Sep, 2024 |
| 3 | John Thomas | Director | 501,193 | 0 | 501,193 | 12.3% | 18 Jun, 2026 |
| 4 | Joseph Cappello | Chief Technical Officer | 318,480 | 0 | 318,480 | 7.8% | 02 Sep, 2026 |
| 5 | Matthew Pulisic | Chief Financial Officer | 278,906 | 0 | 278,906 | 6.8% | 18 Jun, 2026 |
| 6 | Yong Yu | Chief Scientific Officer | 258,688 | 0 | 258,688 | 6.4% | 02 Sep, 2026 |
| 7 | Eric Groen | General Counsel | 233,957 | 0 | 233,957 | 5.7% | 18 Jun, 2026 |
| 8 | Qian Zhang | Associate Vp, Research | 139,333 | 0 | 139,333 | 3.4% | 02 May, 2023 |
| 9 | Mary Mirabelli | Director | 102,693 | 0 | 102,693 | 2.5% | 18 Jun, 2026 |
| 10 | James L Tyree | Director | 96,483 | 0 | 96,483 | 2.4% | 18 Jun, 2026 |
| 11 | John W Smither | Director | 91,403 | 0 | 91,403 | 2.2% | 02 Jul, 2026 |
| 12 | Lourie S. Zak | Chief Financial Officer | 82,452 | 0 | 82,452 | 2.0% | 20 Dec, 2024 |
| 13 | Ralph Smalling | Head Of Regulatory | 67,611 | 0 | 67,611 | 1.7% | 04 Jun, 2026 |
| 14 | Sean Ryder | General Counsel | 47,621 | 0 | 47,621 | 1.2% | 13 May, 2025 |
| 15 | Caroline Jewett | Head Of Quality | 21,135 | 0 | 21,135 | 0.5% | 12 Sep, 2023 |
| 16 | Gabe Woodward | Director | 4,186 | 0 | 4,186 | 0.1% | 02 May, 2023 |
| 17 | Doug Samuelson | Chief Financial Officer | 2,303 | 0 | 2,303 | 0.1% | 22 Aug, 2023 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 04 Aug, 2026 | Joseph Cappello | Chief Technical Officer | Disposed S | 653 | $2.95 | $1.92K | 328,737 | Direct |
| 04 Aug, 2026 | Yong Yu | Chief Scientific Officer | Disposed S | 653 | $2.94 | $1.92K | 268,371 | Direct |
| 01 Jul, 2026 | John W Smither | Director | Disposed S | 12,000 | $2.91 | $34.90K | 91,403 | Direct |
| 16 Jun, 2026 | Mary Mirabelli | Director | Acquired A | 28,409 | $0.00 | $0 | 102,693 | Direct |
| 16 Jun, 2026 | James L Tyree | Director | Acquired A | 28,409 | $0.00 | $0 | 96,483 | Direct |
| 16 Jun, 2026 | John W Smither | Director | Acquired A | 28,409 | $0.00 | $0 | 103,403 | Direct |
| 16 Jun, 2026 | Matthew Pulisic | Chief Financial Officer | Acquired A | 278,906 | $0.00 | $0 | 278,906 | Direct |
| 16 Jun, 2026 | Joseph Cappello | Chief Technical Officer | Acquired A | 174,841 | $0.00 | $0 | 329,390 | Direct |
| 16 Jun, 2026 | Eric Groen | General Counsel | Acquired A | 233,957 | $0.00 | $0 | 233,957 | Direct |
| 16 Jun, 2026 | Yong Yu | Chief Scientific Officer | Acquired A | 119,318 | $0.00 | $0 | 269,024 | Direct |
| 16 Jun, 2026 | John Thomas | Director | Acquired A | 28,409 | $0.00 | $0 | 501,193 | Direct |
| 16 Jun, 2026 | Thomas Zindrick | President And Ceo | Acquired A | 730,601 | $0.00 | $0 | 1,263,913 | Direct |
| 16 Jun, 2026 | John Thomas | Director | Acquired A | 31,566 | $0.00 | $0 | 31,566 | Direct |
| 16 Jun, 2026 | James L Tyree | Director | Acquired A | 31,566 | $0.00 | $0 | 31,566 | Direct |
| 16 Jun, 2026 | John W Smither | Director | Acquired A | 31,566 | $0.00 | $0 | 31,566 | Direct |
| 16 Jun, 2026 | Mary Mirabelli | Director | Acquired A | 31,566 | $0.00 | $0 | 31,566 | Direct |
| 03 Jun, 2026 | Ralph Smalling | Head Of Regulatory | Disposed S | 192 | $2.93 | $563 | 67,611 | Direct |
| 01 Jun, 2026 | John Thomas | Director | Disposed S | 10,000 | $2.98 | $29.80K | 472,784 | Direct |
| 11 May, 2026 | Ralph Smalling | Head Of Regulatory | Disposed S | 270 | $2.98 | $804 | 67,803 | Direct |
| 11 May, 2026 | Joseph Cappello | Chief Technical Officer | Disposed S | 605 | $2.97 | $1.80K | 154,549 | Direct |